Gerald Koch said:
Handling liquids is preferable to handling solids 99% of the time. Any chemist will tell you this.
Yeah right. Nobody seems to be able to find it at a reasonable price in any form.Gerald Koch said:
Gerald Koch said:BTW, by creating a large volume of solution you create the potential problem of spills and the difficulty of cleaning them up. Trading one problem for another.
Yeah right. Nobody seems to be able to find it at a reasonable price in any form.Gerald Koch said:I would be inclined to look around for granular forms of these two chemicals.
Steve Hamley said:So maybe give the Artcraft stuff a try.
Steve
Then I should piddle on my woad and let it stand several days until it begins to smell like ammonia, than trample around in it to get it all properly mixed, according to an ancient recipe. And we worry about amidol?Tom Hoskinson said:"Would the amidol base, dissolved in glycol, be blue?"
Well, the amidol (2,4-diaminophenol dihydrochloride) that I've dissolved in glycol is certainly a very deep dark blue.
Maybe you've done it, Pat.
Then again, maybe you HAVE re-created Woad!
Why would methanol activate the alkaline behavior of TEA? If it would do that, propylene glycol might also.avandesande said:You could try a little methanol instead of water.
gainer said:TEA does appear to debase (my pun) metol and appears to cause less oxidation in the process. Just enough water to make a paste is all you need. Add TEA to make a 10% solution and warm it. Whatever the product is, dilute one part of it with 50 parts of about a 3% sodium sulfite solution and you have a pretty good developer.
Are you sure that what settled out after cooling was metol and not the sulfate salt of TEA? For every 10 grams of metol you put in, about 3 grams of sulfate ion are released from the metol. The sulfate of TEA has quite a large molecular weight, and if it is not soluble in TEA it may look like a lot of metol settled out. Then too, the hot water may have oxidized some of the metol. You might try 10 grams of metol and a teaspoon or two of COOL water. Make it into a paste and add a little TEA. Work this around some and add enough TEA at room temperature to make 100 ml. In other words, keep the temperature down until the metol is well covered by the TEA. Stir it well and warm it to maybe 140 F. Let it sit for hours or until it cools and test the liquid for activity by mixing 5 ml of it in 250 ml of water with a teaspoon (about 8 grams) of sulfite. In my experiments, this solution is about as active as full strength D-23, an 8 minute developer for, say, HP5+.sanking said:How would making a paste and then adding the TEA differ from just adding a small amount of very hot water, dissolving the metol and then adding this to TEA? I have done this and the solution appeared to dissolve into the TEA with no problem, but later when the TEA cooled I could see that much of the metol had come out of solution.
Sandy
I meant that to say 8 ml. which is 7.7 in government terms. A heaping (this is possible with TEA) 1/2 tbs will do it. Half a tablespoon comes in most measuring spoon sets and is 7.5 ml.gainer said:There is a slightly different way to go about this. I calculate, based on typical 149.19 molecular weight of TEA supplied by Dow, that it would take 0.87 grams of TEA to release the base of a gram of metol and 1.57 grams to do that for amidol. That translates to 0.77 ml and 1.4 ml at room temperature. One could make the paste with, say, 7 ml TEA and 10 g metol and then add cool water. ...
gainer said:You might try 10 grams of metol and a teaspoon or two of COOL water. Make it into a paste and add a little TEA. Work this around some and add enough TEA at room temperature to make 100 ml. In other words, keep the temperature down until the metol is well covered by the TEA. Stir it well and warm it to maybe 140 F. Let it sit for hours or until it cools and test the liquid for activity by mixing 5 ml of it in 250 ml of water with a teaspoon (about 8 grams) of sulfite. In my experiments, this solution is about as active as full strength D-23, an 8 minute developer for, say, HP5+.
The solution should be a light honey color. I made some last night and some a few days ago and both are still that color.
gainer said:Now there is joy on Croagh Padraic!
gainer said:Now there is joy on Croagh Padraic!
When you get to the pearly gates you can ask my father, Patrick Ward Gainer, why he named it thus. I'm not sure of the spelling, but he told me it meant "Patrick's Mountain". His doctorate was in philosophy and philology of English, from St. Louis University. His ancestors came from Ireland, where the name is now spelled Gainor, but when they came over in 1745, a county clerk or some recorder spelled it our way. The same sort of thing caused the Monongahela river to run through Monongalia county. He married Antoinette Kizinski who came from Poland when she was 5, and he learned Polish, so he said, in self defence. She spoke Polish and English both without accent.sanking said:Did you mean Croagh Padraig?
If so, how can anyone be happy in a place where the major gratification is flagellation?
Meanwhile, back in Easley, South Carolina, we found that the metol mixed in TEA according to your instructions worked nicely.
Sandy
Dear brother ,,It's probably not going to be used alone. The pH requirements depend lso on whatever is used with the amidol. I have done both, and prefer to use glycol because it allows playing with the alkali. The following is a pretty good developer.
10 grams ascorbic or erythorbic acid.
0.1 gram amidol
Propylene glycol to 100 ml.
!0 ml of this in 250 ml water will require 2 ml of TEA to work in a reasonable time. With 10 ml TEA it will develop HP5+ or whatever the current Arista II in about 6 minutes. In this case, of course, you can figure that almost 2 ml went to neutralize the ascorbic acid.
Patrick Gainer passed away many years ago, so...Dear brother ,,
This is an odd and inconsistent recipe.
Is it a one-shot recipe or what?
The amount of amidol in the recipe is very low (0.1). Is this number correct?
Written in the recipe (! 0 ml of this in 250 ml water will require 2 ml of TEA) and I wonder, what is meant by (0ml)?
Have you tested and tried that recipe?
- Please, the recipe needs more clarifications and explanations.
God bless you
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